Abstract Details

Name: hirdesh kumar
Affiliation: Udaipur Solar Observatory, Physical Research Laboratory, Udaipur 313001, India
Conference ID: ASI2020_115
Title : Can magnetic-jerk accompanying major solar flares excite seismic emission in sunspots?
Authors and Co-Authors : H. Kumar, B. Kumar and C.R. Sangeetha
Abstract Type : Poster
Abstract Category : Sun and the Solar System
Abstract : Solar flares release a large amount of energy and energetic particles in the solar atmosphere within the time-scales of a few tens of minutes. It is generally believed that the magnetic energy stored in the solar active regions gets released during the flares and that is demonostrated in the form of emission of high budget thermal energies, variety of high energy electromagnetic radiations, energetic particles and Coronal mass ejections (CMEs). It has also been realized that high budget of energy and energetic particles produced during major solar flares can generate seismic waves in the Sun. In this work, we have studied seismic emissions in sunspots accompanying 'M' and 'X' class flares using high resolution Dopplergrams and magnetograms from Helioseismic and Magnetic Imager (HMI) onboard Solar Dynamic Observatory (SDO) spacecraft. We have also used H alpha images from Global Oscillations Network Group (GONG), hard X-ray observations from RHESSI and soft X-ray observations from GOES for flare information. Our analysis suggests that abrupt changes in magnetic fields leading to impulsive changes in the Lorentz force could also excite seismic waves in the sunspots.